Abstract An EIT method with planar electrode array has been proposed and a hand-held planar electrode system has developed. Based on a 3-dimentional finite element model, a modified weighted backprojection algorithm, which is back-projected along equipotential surfaces of the 3D electric filed, is used to reconstruct slice images of 3D conductivity distribution under electrode array. The electrical field distribution has been calculated and several slice images beneath the electrode plane have been reconstructed. The result showed that superficial object can be distinguished well, but image of deeper object needs to be improved sequentially in the future.
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